Motor driven calculating machine



Sept: 17. 1940. u. EICHLER MOTOR DRIVEN CALCULATING MACHINE Filed Dec.28, 1936 13 Sheets-Sheet 2 ZSnnentor (Ittorneg U. E ICHLER IOTOR DRIVENCALCULATING IACHINE Sept. 11, 1940.

Filed Dec. 2a, 1956 13 Shouts-Sheet 3 5 iii; 5

3 Inventor R Z Z/CH Gttomeg q 17, 1940- u. EICHLER lo'ron DRIVENCALCULATING noun":

Filed Dec. 28, 1936 13 Sheets-Sheet 4 UE A /e 5y (i cator J Sept. 17,1940. u. EICHLER 2,215,263

I MOTOR DRIVEN CALCULATINC! MACHINE Filed Dec. 28, 1936 15 Sheets-Sheet5 ZSnucntor f/c/l/ek p 1940- V U. EICHLER 2,215,263

IOTOK DRIVEN CALCULATING IACHINE Filed Dec. 28, 1936 13 Santa-Sheet eSnnentgr MB EZI C/I/er attorney Q 1940- I u. EICHLER IOTOR DRIVERCALCULATING IIACKINE Filed Dec. 2a, 1936 13 Shoots-Shoot '1 ZhwentorGttorneg q- 17, 1940- .u. EICHLER IOTOR DRIVEN CALCULATING IACBINI FiledDec. 28, 1936 1,3 Shana-Sheet 8 NH wm [m/en'for U-ZVCA/ r )5! e Sept.17, 1940. u. EICHLER 2,215,263

MOTOR DRIVEN CALCULATING MACHINE Filed Dec. 28, 1936 13 Sheets-Sheet 103nventor Sept. 17, 1940.

u. EICHLER 2,215,263

MOTOR DRIVEN CALCULATING MACHINE 13 Sheets-Sheet 1 1 Filed Dec. 28, 1936'IIIII/IIII/[IIIIl/II/II/I/II/I/II/III/IIII/I/I/IIII/IIIII/I/IIIIIIIIIIIII/IIII/IIIIIIIIIII-lnventor B a Z/ a? #i Gttorncg U. EICHLER IO'I'OR DRIVEN CALCULATINGMACHINE Se t. 17, 1940.

Filed Dec. 28, 1936 13 Sheets-Sheet 12 I/VVEA/TOIF l E/cA/er 7:? 2 .W

' HTzv/PWEY Sept. 17, 1940. u ElCHLER IOTOR DRIVEN CALCULATING IACHINEFiled 09 28, 1936 is sh ts-sheet [wax 70,9 [CA/e1 WM 57-7-0044; 7

Patented Sept. 17, 1940 UNITED STATES PATENT OFFICE 2,215,263 MOTOR.DRIVEN CALCULATING MACHINE Ulrich Eichler, Glashutte, GermanyApplication December 28, 1936, Serial No. 117,952 In Germany April 5,1935 18 Claims.

chine carriage must be preliminarily set accordv ing to the number ofdigits in the multiplier,

whereupon the multiplier is then set up, beginning with the digit at theleft.

The object of the invention is to eliminate this preliminary setting ofthe carriage and to begin the calculation when the carriage is in itsinitial, thus its extreme left, position.

An object of the invention is to coordinate with each multiplier key twosetting plates, the first of which actuates the multiplying mechanism inaccordance with the key value of the multiplier key depressed while thesecond actuates the multiplying mechanism in accordance with the keyvalue of the key depressed increased by the value 1.

A further object of the invention is to provide means for actuating saidsetting plates dependent upon the immediately preceding multiplyingoperation. For instance, if a multiplier key 0-4 was involved in thepreceding operation, which operated the machine additively in'normalmanner, then one setting plate is actuated in the succeeding operation,while if a multiplier key 5-9 was actuated in the preceding operationwhich operated the machine subtractively or with short-cutmultiplication, then the other plate is actuated in the succeedingoperation.

An object of the invention therefore is to provide means for eliminatingany special setting of the carriage during a calculation.

A further object of the invention is to provide means for operating withshort-cut multiplication so as to secure calculations with an average offewer main shaft revolutions.

In order to have the multiplier keys in the smallest possible field themultiplying keys are preferably disposed in two adjacent rows, onecontaining keys having values 0-4 and the other keys having the values5-9. Two rows of six setting plates are disposed below the keys.

Further details are explained with reference to the exemplary embodimentshown on the drawings. I

Fig. 1 is a plan view.

Fig. 1a is a plan view with a keyboard, carriage and cover platesremoved.

Fig. 2 is a cross sectional view taken on the section line 11-11 of Fig.1a looking in the direction of the arrow, with parts omitted for greaterclarity.

Fig. 3 is a cross sectional view of the multiplier setting mechanismtaken on the section line III-III of Fig. 1 on an enlarged scale.

Fig. 4 is a cross sectional view similar to Fig. 3 showing the leverspivoted to the multiplier keys after an operation involving subtractiveor shortcut multiplication.

Fig. 5 is a cross sectional view similar to Fig. 3,

with the 7 multiplier key depressed, showing the levers pivoted to themultiplier keys after an operation involving additive multiplication.

Fig. 5a is a view similar to Fig. 5 illustrating the lever I83 inanother position.

Fig. 6 is a cross sectional view taken on the section line III-411 ofFig. 1 with parts omitted for greater clarity looking in the directionofthe arrow :1: in Fig. 10..

Fig. 6a is a cross sectional view taken on the section line II-II ofFig. 1a with parts omitted for greater clarity.

Fig. 7 is a vertical cross-sectional view taken on section line VII-VIIof Fig. 1.

Fig. 8 shows a view similar to- Fig. 7 with the I parts in a differentposition.

Fig. 9 is a cross sectional view taken on the section line IX--IX ofFig. 3 and looking in the direction of the arrows.

Fig. 10 is a cross sectional view taken on the section line X--X of Fig.1a with the wall It removed, showing the drive control with certainportions omitted for greater clarity.

' Fig. 11 is-a detailed view looking from the left of Figure 2 andillustrating particularly the elements coacting with the addition andsubtraction keys.

Fig. 12 is a partial plan view of Fig. 18 withthe cover plate andcarriage removed.

Fig. 13 is across sectional view taken on the section line XIII--XIII ofFig. 1.

Fig. 14 is a partial rear elevational view of a portion of the carriageshifting mechanism looking in the direction of the arrow 2 in Fig. 1a.

Fig. 15 is an elevational view of certain elements of the reversingmechanism in one position.

Fig. 15a. is a similar view to Fig. 15 with the elements in anotherposition.

Fig. 16 is an elevational view of portions of the controlling means forthe carriage shifting mechanism.

Fig. 17 is an elevational view of the setting bar l5! shown in crosssection in Fig. 9 illustrating the formation of the recesses thereinwhich cooperate with the setting plates.

Fig. 18 is a partial vertical cross sectional view taken on the sectionline XVIII-XVIII of Fig. 1.

l designates a keyboard which serves for setting up the multiplicand inmultiplication calculation. The carriage 2 disposed slidably on themachine frame carries the revolutions counter 3 and the totalizer 4. 5designates the two carriage shift keys. The clear key is designated by5. The addition key is designated by 8 and the subtraction key by 9. Theoperation of the drive actuated by the two last-named keys deservesspecial consideration with respect to the present invention.

Plus and minus keys As shown on Fig. 2, the keys 8, 9 are mounted on theparallel, adjacent key levers I0, I I. These latter are Journalledoscillatably on the lateral wall [4 of the machine frame and are subjectto the action of springs (not shown) which retain the keys in theposition shown on Fig. 2. Attached to key lever I is a .pin (Figs. 11,and 15a) which extends into the plane of a lever 16. Lever I6 isjournalled rotatably on the shaft ll. Freely rotatable on shaft I1 is alever 18 which is connected with lever I6 and in the movement path ofwhich a pin 19 attached to key lever H extends. Levers l6 and 18 areprovided with surfaces l6 and I8 respectively with which pins IF and [9contact on depression of the corresponding keys, and thereby rock thelevers. According to the position of lever l6 shown on Fig. 6a this isthe one assumed by the levers after depressing the plus key 8. If theminus key 9 were pressed the levers l6, 18 would be swung clockwise bythe pin l9 striking against the surface Hi. The levers l6, 18 wouldremain in this position until shifted back by depression of the pluskey.

A bar 2| is pivoted by means ofa pin 20 to lever I6 (Fig. 6a) and thebar 2! has an elongated recess 22 in which engages a pin 23 on theframe.

wall 14. Attached to an upwardly extending extension 24 of bar 2| is apin 25, over which the forked end 25 of a lever 21 engages. Lever 21 ispivotally mounted on a shaft 28 which is journalled in the wall I4.Attached to the outwardly extending end of shaft 28 is a lever 29 which,by means of a pin 30 provided at its end, engages in a slot-shapedrecess 3! of a lever 32. Lever 32 is pivoted at 33 to plate 34 which, bymeans of a screw bolt 35, is journalled oscillatably on the frame wallM. A roller 35 is journalled on plate 34 and cooperates with a cam disc38 mounted on the main calculating shaft 37. The cam disc 38 is formedsubstantially concentric and circular and is provided with an arcuaterecess 38, in which the roller 35 lies when shaft 31 is at rest. Whenshaft 31 is actuated the plate 34 is swung out in the direction of thearrow shown in Fig. 6a by the cam disc 38 against the traction of spring34'. Lever 32 will then move in the direction of the arrow in Fig. 6a.

Lever 32 is provided with two shoulders 32' and 32", one or the other ofwhich contacts with a pin 39' or 39" according to the position intowhich lever 32 is swung by the elements 2l30. The pins 39, 39" are on aplate 39 which is disposed on a rocking shaft 40. The latter shaft 40 isjournalled in the two frame walls l4, l4 and provided with upwardlyextending pins 4| (Figs. 1a and 6a) which engage in corresponding boresof a bar 42.

Bar 42 is slidable transversely to its length in the slots 43 (Fig. 6a),which are formed, on the one hand, by the suitably machined edges 44 ofthe lateral walls l4, l4, and on the other by sheet metal bars 45. Bar42 engages (Fig. 12) in grooves 45 of the mountings 4'! which at eachside carry the transmission bevel gears 48, 49 and which are mountedlongitudinally slidable but non-rotatable on the preferably squareshafts 50.

An extension 29' with a wedge-shaped end is attached to lever 29 so thatthe elements 21-29 (Fig. 6a) always pass reliably into one of its endpositions and remains there until reversed. Coordinated with theextension 29 is a lever 52 journalled at 5! in the machine frame andwhich is also provided with a wedge-shaped shoulder 52'. This lever issubject to the action of a traction spring 54 attached at 54' to themachine frame. If elements 2l29 are moved from the one into the otherend position the extension 29' forces lever 52 back against the tractionof spring 54, whereupon extension 29' springs to the other side ofshoulder 52'.

Actuating mechanism Coordinated with each shaft 50, see Fig. 18, is aparallel shaft 53, on each of which is mounted the usual actuatorcylinder 57 and a bevel gear 58. Bevel gears 58 are driven by bevelgears 59 mounted on the main shaft 31. Gears 60, disposed axiallyslidable but non-rotatable on shafts 50, cooperate with the actuatorcylinders 57, the position of said gears 60 depending on the depressedkeys of the corresponding key bank.

Differential setting mechanism The gear 60, provided with ten teeth, isset by means of a bar 300 (see Fig. 18) longitudinally slidable on thekeyboard frame, and the right end of the bar 300 is provided with a fork30l which engages over the wheels 60. The end 300' of bar 300 is turnedlongitudinally for 90 and is provided with a rack which engages with agear 302. Gear 302 is connected with a number wheel 303 on a shaft 304,which is journalled, on the one hand, in the cover plate 305 of thekeyboard, and on the other, in a bracket 306 connected with the coverplate.

An inspection window (see Fig. 1) is coordinated with each number wheel303. A hook 308 is secured to bar 300, and serves for the attachment ofa traction spring 309, which is attached at the other end to plate 305by means of the hook 310. Spring 309 imparts to bar 300 the tendency tomove to the left, with respect to Fig. 18. Roller 31!, journalled on themember 300 of bar 300 bears against the end of a lever 3i2 which,.through screw bolt 3I3, is journalled on the frame 3l4 of the keyboard.

Integral with lever 3I2 is a lever arm 315 to the end of which a' bar 3|1 is pivoted by means of a pin 3H5. The bar is connected on the otherhand, through pivot pin 318, with a lever 319 which is journalled at 320in the frame 3|4 of the keyboard.

The keys 32! forming the keyboard I are each on a key rod 322 which isvertically slidable in the keyboard frame. Journalled to each key rod isa roller 323 which extends into the range of the bar 3". It is also tobe noted that each key rod 322 is subject to the action of a spring notshown on the drawing and having the tendency to retain the key bars inthe position shown on Fig. 18.

- subject to similar control.

Disposed on the keyboard frame slidably is a control bar 324 providedwith recesses 324'. Pins 825 provided on the key rods 322 cooperate withthese recesses. On depressing any key, bar 324 is actuated against thetraction of its engaging spring 326 and, when the pin has passed throughthe recess, springs back to the end position shown on Fig. 18, in whichit prevents the key rod 322 from returning until the end of thecalculation.

A device not shown on the drawing moves back bar 324 against the actionof spring 326 in the direction of the arrow to release the pin 325. Bar324 can be returned by means of a lever rod not shown connected withclear key 6.

On depressing one of the keys 32| the corresponding'roller 323 strikesagainst bar 3|1, whereby the parts 3", 3| 5, 3|9 describe a pivotalmovement, the travel of which depends on the .-.key depressed. Forexample, if the key 32| bearing "4 is depressed (see dotted position onFig. 18) the members 3| 5, 3| 1, 3|9 are carried into the position shownin dotted lines on Fig. 18. Lever arm 3|2 then moves the bar 300 againstthe traction of spring 389 to the right so that the coordinated gear 60(see dotted position of Fig. 18) is set in a position to coact with thatportion of the actuator cylinder 51 which has four teeth. At the sametime the number wheel 383 is moved by the teeth in the end 308' so thata 4 appears in the corresponding window 301. When the main calculatingshaft 31 makes a complete revolution, the shaft 53 will also make acomplete revolution. However, the shaft 50 carrying the gear 60corresponding to the actuator cylinder 51 involved, is rotated for of arevolution.

According to the position of the coordinated bevel gear mounting 41,either bevel gear 49 or bevel gear 48 meshes with the correspondingbevel gear 6| (Fig. 5). Coordinated with each totalizer Window providedin the carriage 2 is a number wheel 63 attached on the shaft 64. Thelatter is journalled in the carriage 2.

Accordingly as bevel gear 49 or 48 engages with bevel gear 6| the numberwheel is rotated in the positive or negative direction. That is, onrotation .of the corresponding shaft '50 for revolution the numberwheel, for example at the start of the operation on 2 is either turnedforwardly to "6 or backwardly to 8.

Revolutions counter It is to be noted that a revolutions counteractuating gear 321, carrying a tooth 321', is attached in known mannerto the end of the shaft 53. The tooth cooperates with a ten tooth gear328 mounted on a shaft 329. The shafts 329 are each journalled axiallyof shaft 59 in the machine frame. Each shaft 329 carries a bevel gearmounting 338 provided with the bevel gears 33| and 332. Each mounting isprovided with a groove 333 in which there is engaged a bar 334 extendingtransversely through the machine, which corresponds substantially to bar42 and is Accordingly as the mountings 330 are moved by bar 334 to theright or left, with respect to Fig. 18, bevel gears 33| or 332 mesh withbevel gears 335. The latter are mounted rotatably on shafts 336 attachedto carriage 2 and are each connected with a number wheel. Coordinatedwith number wheels 331 are the windows 338 which show the revolutionscounter on Fig. 1, designated by 3.

Carriage shifting mechanism The carriage 2 is actuated by the keysdesignated by 5 in the direction shown by the arrows on the keys.Inasmuch as in multiplying, of greatest interest here, the carriageafter calculating each individual decimal order of the multiplier, isshifted to the right, in the following only the function of the rightshift key 5, at the right of Fig. 1 will be explained, that is, thatpart which controls the right shift of the carriage. I

This key 5 is mounted on a rod 55 slidable in the machine frame and withwhich a traction spring 56 engages, which tends to retain the rod 55 inthe position shown on Fig. 2. Rod 55 is provided with a pin 65 whichextends into the movement plane of the end of an angularly bent lever66. Lever 66 is attached to a shaft 1| journailed in the frame wall l4,and attached to lever 66 is a traction spring 12 having its other 'endattached to the machine frame and this spring tends to retain the leverin the position shown in Fig. 2. Connected to lever 66, at 66, is a rod13, which is pivoted at the other end, at 14, to a rod journalledaxially slidable in the machine frame. Attached to rod 15 is a plate 16which engages in a groove of a clutch connection 11 provided on a gear18. Gear 18 is axially slidable and freely rotatable on a pin 19attached to the machine frame.

Gear 18 is driven from main shaft 31. For this purpose the shaft 53,furthest to the right with respect to Fig. 1, is extended by the shaftportion 53, at the end of which a gear 89 is at tached, which-mesheswith a gear 8| (Fig. 2). Gear 8| is journalled on pin 19 and providedwith a clutch connection 8| cooperating with clutch connection 11. Theclutch connections 8| and 11 are carried into the coupling position by amovement of gear 18 on pin 19, so that the gears 8|, 18 are positivelyrotated together. Gear 18 is in constant mesh with an intermediate gear82 rotatably journalled in the machine frame (Figs. 2, 14) which gear 82is connected, on the other hand, with a gear 83. Gear 83 is jour-.

nalled on the machine frame at 83' and provided Accumulator disengagingmechanism Inasmuch as the actuator cylinder shafts 53 rotatesimultaneously with the main shaft 31, measures must be provided toprevent transmission of the rotation of the calculating mechanism to thecalculating apparatus disposed in the carriage. trated this is done byconnecting the cam disc 38 (Fig. 2) detachably with'the drive shaft 31by means of a coupling member. The latter consists of a pawl 86 which ispivoted by means of a pivot pin 81 to the disc 38 eccentrically. Bymeans of a pressure spring 88 engaging an extension 86 of pawl 86 theshoulder 86 on pawl 86 is forced in front of the projection 89' of awheel 89 fast on shaft 31. Provided within the range of the extension 86is a roller 98 which is journalled on the projecting arm of a plate 9|.Plate 9| is oscillatably mounted on a screw bolt 92 provided on themachine frame and is drawn by a In the exemplary embodiment illusspring93 engaging therewith against a stop 94. Plate 9I also carries aprojection 9I' into the range of which an extension 95' on bar 95extends. Bar 95 engages by a longitudinal slot 95" a pin 96 attached tothe frame. At the right end, with respect to Fig. 2, a traction spring91 attached at the other side of the machine frame engages bar 95. Bar95 is journalled at the other side to a lever 93 by means of a pivot pin98'. Lever 9B is oscillatably mounted on the pin 99 provided on themachine frame. Another lever I00 is connected with lever 98 and its endis provided with a pin I0'l which takes a position under lever 66.

If lever 66 is depressed by the carriage shift key 5 the two levers 98,I00 are simultaneously rocked in the direction of the arrow on Fig. 2.Bar 95 is thereby also moved to the left against the action of spring 91which, in turn, causes extension 95 to strike against shoulder 9I',whereby plate 9| describes a rocking movement in the direction of thearrow. Roller 90 is thereby applied against extension 86 and the pawl 86is swung out so that its shoulder 86" passes out of the range ofshoulder 89'.

Thus, while the coupling 11, 8| is closed by pressing key 5, on theother hand the cam disc 38 is disconnected from the drive shaft. The camdisc 38 (Fig. 6a) is inoperative while drive shaft 31 rotates, so thatplate 34 and the shoulder lever pivoted thereto is not rocked or moved.The gear mountings 41 thus remain in their neutral central position, sothat none of the gears 48, 49 provided thereon mesh with the coordinatedbevel gears GI.

The gear mountings 41, as shown in Fig. 13, are "normally maintained intheir neutral central position, by levers 350 and 35I, pivoted to thelateral walls, and cooperating with the bar 42. A spring 352 isconnected at its ends to the levers 350 and 35I and normally holds thelevers against the stop pins 353 and 354 provided on the lateral walls.Generally two sets of levers 350 and 35I and cooperating parts areprovided.

Drive mechanism The simultaneous operation of the drive motor and thedrive shaft 31 takes place when one of the carriage shift keys 5, theaddition key 8 or the subtraction key 9, is pressed, through the shaftI1 (Fig. la). The two levers I02 and I03, Fig. 11, are attached to thisshaft I1. A pin I04 provided on the key lever I0 extends into the rangeof lever I02, and a pin I05 provided on key lever II extends into therange of lever I03. If one of the keys 8 or 9 is pressed the coordinatedlever I02 or I03 and therewith the shaft I1 is rocked in the directionof the arrow on Fig. 2.

Also attached to shaft I1 is a lever I06 (Fig. 10) the end of which isconnected to a rod I01. Rod I01 is pivoted at the other end, at I08, toa lever I09 which is rotatably attached at IIO to the machine frame. Thefree end of lever I09 carries an insulated contact bridge III which,when lever I09 is rocked in the direction of the arrow shown on Fig. 10by the said rocking of shaft I1, closes the contact II2 which isinterposed in the circuit of the electric motor H3. The drive shaft II4of the motor is connected by a drive belt II5 with an intermediate shaftIIB. Mounted on shaft I I6, which is journalled in the machine frame, isa gear I I1 which meshes with a gear II8 attached on drive shaft 31.

In order to set the machine in operation, by

pressing one of the keys 5, the bar (Fig. 2) is provided with a rollerI22 which, when the rod 95 is moved to the left contacts with lever I02and thereby rocks shaft II.

In order that main shaft 31, after pressing one of the keys 5, 8 or 9,will describe a complete revolution before the motor is again cut outthere is attached on shaft IIB (Fig. 10) a stop disc II9 provided with arecess II9. Extending into this recess, when the machine is inoperative,is a lug I20 which is attached by means of an extension I01, to rod I01.If, thus, on pressing a key, the rod I01 is moved to the left, withrespect to Fig. 10, the stop lug I20 is simultaneously drawn from thenotch N9 of disc II9. Inasmuch as shaft IIS begins to rotate at the sametime, the lug I20 cannot at once pass back into the recess II9' afterrelease of rod I01. Only when shaft I16 and/or main shaft 31 havedescribed a complete rotation can rod I01, subject to the action of atraction spring I2I, again pass back to its initial position, wherebyshafts 31 and H6 are brought to a standstill and the current to themotor cut off.

Short-cut multiplication mechanism Coordinated with the calculatingmachine are the multiplier keys I23 (Fig. 1) which are arranged in twoadjacent rows. Each key I23 is mounted on a slide I24 (Figs. 4 and 8).The upper ends of slides I24 are guided in guide slots I25 provided in aplate I26. The lower tapered ends I24 of the slides I24 are guided incorresponding slots I21 of a plate I21. The lower plate I21 is connectedby a connecting member I28 with upper plate I26 which, in turn, ismounted on a vertical frame wall I29. Pressure springs I30 are placed onthe tapered ends I24 of slides I24 and tend to apply the extendedshoulders I24" on the slide I24 against the lower side of plate I26,thus tending to retain the slides in the initial position.

A substantially T-shaped lever I32 is pivoted to each slide I24 by meansof a pivot I3I. Each of these T-shaped levers I32 is provided with a pinI33 which extends into a slot-shaped recess I34 of a substantiallyU-shaped bar I34 (Fig. 9). The bar I34 is thus provided with as manyslots I34 as there are levers I32 and/or key slides I24, and the slotsI34 are machined in the two vertically, downwardly extending flaps ofthe bar I34. The bar I34 is guided, longitudinally slidable, on theunder side of the plate I21, for which purpose slots I34 are machined(Fig. 8) in bar I34 for the attaching screws I35. A lever I31 is pivotedat the right end of bar I34 (Fig. 4) by means of a pivot pin I36, and

its free end is provided with two recesses I31,

Fig. 4 shows bar I34 in its right end and Fig. 3 in its left endposition. These end positions are caused by plate 39, according towhether it is in the position shown by full lines or by dotted lines, inFig. 4. Pivot pin I36 on lever I31 is guided in an elongated openingI38, so that bar I34 is always moved when plate 39 moves from one intothe other end position. When plate 39 merely passes from oneend'position to the neutral position shown in Fig. 6a no movement isproduced as a result of the play of pin I39 in the elongated openingI38.

Plate I34 is provided with an upwardly extending projection or shoulderI39 (Fig. 4) which cooperates with the lower end I40. of a lever I40journalled at I4I. Lever I40 is retained in the position shown in Fig. 4by a spring I42 engaged therewith. Attached to the free end of lever I40is'a curved plate provided with a red color field I43 and a black colorfield I44. If lever I40 is in the position shown on Fig. 4 the red markappears in the window I45 provided in plate I26. If bar I34 is moved tothe left, when plate 39 passes into the dotted position of Fig. 4, theshoulder I39 strikes against the end I40 of lever I40 and rocks itagainst the action of spring I42, and the black mark will appear inwindow Disposed on the frame wall I29 (Fig. 8) are two other plates I46and I41, parallel with plates I26, I21, and which are provided with tworows of slides, corresponding to the double row arrangement of keyslides I24, and, in order to distinguish them more clearly, designatedby I48a-I48m (Fig. 9). .These slides, of which there are six in a row,are coordinated with the levers I32 so that the levers assume a positioneither over the slides at the right thereof (see Figs. 4 and 8), or overthe slides at the left (see Fig. 5). Mounted on each slide I48a-I48m isa pressure spring I49 which bears against the plate I41 and tends toretain the slides in their initial position, in which the abutments I48thereon are applied against a bar I50 of fibre or the like provided onthe under side of plate I46.

Disposed between the. two rows of slides I48al4 8m is a U-shaped bar I5I(Figs. 8, 9 and 17) formed as a slide and in the right portion of whicha rack I52 is attached by means of the screws I53 (Fig. 9). Both sidesof the. U-shaped bar I5I are provided with recesses which are graduatedwith respect to their longitudinal extent in the direction in which thebar moves. The recesses provided at the left side, with respect to Fig.1, that is, coordinated with slides I48b-I48f, are designated byI54b-I54f. It is to be noted that no recess is provided on bar I5I forthe slide I48a at the extreme left (Fig. 8). In the initial position ofthe bar I5I, shown in Fig. 3, the right edge of slide I 48a is flushwith the left end of bar I5I. The recesses of bar I5I at the right,relative to Fig. 1, coordimated with slides I48g--I48m are designated byI54gl54m.

The rack I52 cooperates (Fig. 8) with a gear I55 which is journalled bymeans of a pin I51 on a frame plate I56 connected with the frame plateI29. Gear I55 is connected with a ratchet wheel I58, with which there iscoordinated a pawl I59 (Fig. v3) which is pivoted by means of a pin I60on a slide I6I on plate I56. The slide I6I is slidably mounted on theplate I56 by means of two screws I56 attached to the plate I56. Thescrews I56 extend through slots I6I' provided in the slide I6I as shownin Fig. 16.

A connecting rod I63 (Fig. 60.) engages by means of a pivot pin I62 atthe lower end of slide I6I, and at the other end engages with a bearingeyelet- I63 over an eccentric disc I64 attached to drive shaft 31. Onrotation of shaft 31, slide I6I is vertically reciprocated in thedirection of the arrow on Fig. 5, through the connecting rod I63. Thenose I59 of paw lI59 thereby contacts with ratchet wheel I58 and shiftsit back in the direction of the arrow shown on Fig. 5.

A pawl I65 provided on a rocker plate I65 also cooperates with theratchet teeth of wheel I58. Plate I65 is rotatably Journalled by meansof'a pin I66 on plate I56. When plateIil is in the position shown inFig. 8 pawl I65 snaps into the ratchet teeth and thereby preventsratchet wheel I58 from turning backward in the direction of the arrow onFig. 8. The tendency of ratchet wheel I58 to move counter-clockwise isprovided by the rack I52 and/or the bar I5I, being subject to the actionof a traction spring I68 engaging with bar I5I and attached to themachine frame at I61.

The recesses I54b--I54m are stepped in the Y depressions I54c and I541are somewhat larger,

so that on actuating the coordinated slides I48c and/or I481, ratchetwheel I58 can rotate for the space of two teeth. Recesses I54d and I54kare again still somewhat larger, so that when the corresponding slide isactuated the ratchet wheel can rotate for the space of three teeth.Recesses I54e and I541 correspond to a rotation of wheel I58 for fourteeth, and, recesses I54! and I54m, finally, to a rotation for the spaceof five teeth.

' With the exception of the two slides H811 and each have a shoulderI48" (Fig. 9). Two bars I69 and I10 are coordinated with these shoulderscorresponding to the double row arrangement. Bar I69 is thus coordinatedwith the slide row I48a-I48 and bar I10 with the 'row I48g-I46m. Thesebars are each pivoted parallelogram-like on two levers I1I journalled atI12 (Fig. 5).

Attached to the bar I69 is an extension I13 passing through the plateI41 (Figs. 7, 9), with which there is engaged a traction spring I15which urges bar I69 to the position shown in Fig. 5. The roller I16(Fig. 9),, which extends into the path of movement of a cam lever I11(Fig. 7) is journalled on the extension I13. Lever I11 is secured to ashaft I18 journalled in the frame wall I29. If bar I69 is depressed bythe shoulder I48" of one of the slides I48b-'-I48f, roller I16 contactswith the cam surface I11 of lever I11'and swings it into the positionshown in Fig. '7.

A downward extension I19, engaged by a traction spring I8I at I80, visattached to the bar I10. A roller I82 is journalled on this extensionand, when bar I10 is depressed, as a result 'of actuating one of thecorresponding slides I48h--I48m, contacts against a cam surface I 83'(Fig. 5) of a lever I83, which is also secured on shaft I18.

Another lever I84 (Fig. 6a) is attached to the end of shaft I18extending through the frame wall I29, and its free end is connected by apin I85 with a cam plate I86 specially shown on Fig. 15. This cam plateI86 engages by a pin I86 in the forked end I81 of an angle lever I81.The latter is journalled at I88 in wall I29 and is provided with ahandle I89 extending through the machine casing.

Coordinated with plate I86 is a double armed lever I98. the two freeends of which are provided with two pins I9I and I92 which extend in thepath of movement of plate I86. If lever I81 is in the position shown inFigs. 6a and 15,

1 another bar I96 (Fig. 7) similar to bars I69 and pin I9I engages inthe lower recess I36 of plate I86. By reversing handle I89 into theposition shown in Fig. 15a pin I9I is disengaged from recess I86 whileon the other hand pin I92 comes into the upper recess I86" of plate I86.This results in a reversing .which will be described in the Operation ofthe machine.

Attached rotatably to the double armed lever I90, which is rotatablyjournalled in the frame wall at I93, is a link I94 which, at the otherend, is connected by pin I95 (Fig. 6a) to the rod 2|.

Rod I69 or rod I10 is moved downwardly accordingly as one of the slidesI48b-I43f or one of the slides l48h l48m is actuated. The result ofthis, however, is that shaft I18 and/or lever. I84 passes either intothe left or right end position, with respect to Fig. 6a. Assuming thatthe plate I86 assumes the position shown on Fig.

6a, rod 2| will assume the right end position.

Disposed between the plates I21 and I46 is I10, which is carriedparallelogram-like by two levers I91 rotatably journalled at I98.Abutment I99 (Fig. 1) and abutment 200' (Fig. 9) extend above and overthis bar H6 in order to actuate the same. Abutment I99 is on slide Scand abutment 200 is secured to slide I48g by means of a a connecting bar2!.

Thus, if slide M31; or By is depressed, bar I96 is simultaneously moveddownwardly. Pivoted on bar I96 at 202 (Fig. '1) is a pawl 203 withwhich, at 204, a traction spring 205 attached to plate I 29 engages(Fig. 6). This traction spring tends to move the pawl to the positionshown in Figs. 3 and 6. The pawl is provided with a projectingshoulder203' which engages overa pin 201 (Fig. 16) passed through acorresponding slot in the frame wall I29. The pin 201 is attached to alever 206 which is rotatably journalled at 208 in wall I29. Engaged withthe free end of the lever 296, at 209, is a traction spring 2I0 whichtends to apply the pawl-like projection 206 of lever 206 in a recess 2|I of a bar 2| I. Bar 2 is provided with two longitudinal slots 2II"through which engage the attaching screws 2I2. bar 2 formed as a slideis a bar 2I3 which is provided with a hook-like downwardly extending end2I3.

A roller 2I4 (Figs. 1a., 2) which is journalled on the flank of a disc2I5 attached to drive shaft 31 extends into the moving 'range of thishooklike end 2I3. A pin 2I6 is attached to the bar 2I3 (Fig. 16)connected with the slide 2| I, and a strong traction spring 2I1 isengaged therewith, the other end thereof being attached to pin 2I8 onwall I29. This spring imparts to slide 2 and bar 2I3 the tendency tomove to the right relative to Fig. 16 or to the left relativeto Fig.

611. These elements are prevented from describing this movement by thepawl projection 206 engaging in the recess 2I I.

Provided on lever 206 (Fig. 16) near the pawl projection 206', is anabutment 206" projecting from the plane of the lever, and with which theend 2!!! of a pawl 2I9 cooperates. Pawl 2I9 is rotatably journalled at220 on an end of a lever 22L A spring 222 engaging pawl 2I9 tends toapply the free end of pawl 2I9 against a stop pin 223 provided on wallI29. Angle lever 22I is subject to the traction of a spring 225 attachedat 224 to I29, so that the-free end 22I' of the angle lever is appliedagainst a pin 226 attached to a bar 221. Bar 221 is pivoted on the onehand, at 228 to a lever 229, which is oscillatably jouring to the arrowon Fig. 5.

Connected to this I nailed at 230 on wall I29. At the other end bar 221is pivoted by means of a pin 23I to the rocking plate I65 (Fig. 6).Plate I65 is provided with a third extension 232 which extends into themovement plane of a pin 233 provided on ratchet wheel I58.

A traction spring 234 (Fig. 16) which is attached at 235 to wall I29engages with lever 229. This spring imparts to rod 221 the tendency tomove to the right as shown in Fig. 16. As the end of rod 221 engages therocker plate I65 this is given the tendency to move clockwise, accord-Lever 229 (Fig. 16), when it can follow the traction of spring 234, actson a pin 236 (Figs. 2, 11) attached to lever I02.

A double armed lever 239 (Fig. 3) is disposed, on the small bearingblock 238, below plate I41. One end of lever 239 is provided with a pin240 on which a pressure spring 2 is mounted which tends to hold thelever in the position shown in Fig. 3. Attached to the other end of thelever is a plate 242 positioned transversely to the direction in whichlever 239 moves (Fig. 9). Plate 242 is arranged so as to come intoposition just below the two ends of the extensions I13 and H9. Pivotedto lever 239 by means of a pivot pin 243 (Fig. 3) is a pawl lever 244,one end .of which is provided with a check lug 244 and the other with anabutment 244". A spring 245 around pin 243 tends to rock lever 244 sothat abutment 244" is applied on the upper edge of lever 239 as shown inFig. 3. The pawl shoulder 244' cooperates with a lateral extension 246provided on another pawl 246.

Pawl 246 is journalled by means of a pin 241 on a downwardly exten ngextension 248 of rack I52 (Fig. 17). In the inoperative or initialposition pawl 246, through the action of a spring 249 (Fig. 3), isapplied against a stop bar 250 provided on the lower side of plate I41.

Cooperating with a notched recess 25I machined in the rocker plate I65in the vicinity of the pawl I65 (Fig. 3), is the correspondingly taperedend 252 of a double armed lever 252, which is journalled at 253 in theplate I56. Pivoted to the free end by means of the screw bolt 254 is asubstantially angular plate 255. A traction spring 251 has one endattached at 258 to lever 252 and at the other end engages with plate 255at 256 (Fig. 6). Through the traction of this spring the tapered end ofplate 255 is applied against a pin 259' on ratchet wheel I58. Alsoengaged with lever 252 is a traction spring 260, the other end of whichis attached to plate I29 and tends to draw the lever end 252 into therecess 25I.

It is also to be noted that a bar 262 is pivoted to handle I89 (Figs. 6,16) by means of a pin 26I, which bar 262, by means of a screw bolt 263which is passed through a slot 262' of bar 262, is journalledlongitudinally slidably on the frame wall I29. Attached to the end ofbar 262 is a pin 264 which extends into the movement path of a two armedlever 261 pivoted to a frame extension 265 at 266. The free end of lever261 is provided with a pin 268 which engages under lever I31. A springwire 269 attached to lever I31 engages under pin 268, so that lever I 31always follows the position of pin 268. If, in order to reverse the camplate I86, handle I89 is carried into the position shown in Fig. 15a,bar 262 is at the same time shifted, that is, to the left, according toFig. 6. Lever 261 is thereby rocked by means of pin 264 so that itcarries lever I31 upwardly, the result of which is that pin 39' passesinto recess I31. 1

- The pin 2I6 (Fig. 2) provided on bar 2I3 extends into the path ofmovement of a lever 21I, attached to'shaft 1I.

' Operation The operation of the new machine is explained with referenceto the following exemplary calculation: 24 X 373.

The 4 is first set up on the key board I (Fig. '1) of the key bank atthe farthest right, and the 2 in the adjacent key bank. The resultthereof is that the gear 60 coordinated with the extreme right key bankis moved on its shaft 50 so that it comes into position opposite thatpart of the actuator cylinder 51 which has four teeth. The gear 60 (Fig.12) coordinated with the second key bank, on the other hand, is moved onits shaft 50 so that it comes opposite that part of the actuatorcylinder 51 which has two teeth.

It is also to be noted that the parts are in the initial position shownon Figs. 3 and 6a. After the multiplicand has been set up in thedescribed manner on the key board the multiplier can be set up by meansof the keys I23, beginning with the lowest decimal position, thus withS, then the '7 and finally the 3 of the highest decimal position ispressed.

Before beginning to set up the multiplier, caution must be observed thatthe black field I44 appears in the window I45 (Fig. 5). This would bethe case according to Fig. 3. In this position the T-shaped lever I32coordinated with the slide of the key I23 bearing indicia 3 is in aposition such that its left end is over the key slide I48d, see Fig. 7.If the red field appears in the opening I45 the key designated by 0 mustbe depressed and thetotalizer and revolutions counter cleared.

If, then, key 3 is pressed (Fig. 7) slide I48d will be depressed and itsspring I49 compressed. The projection I48" (Fig. 9) of said slidethereby strikes against bar I69 and moves it downwardly from thestarting or initial position into the position shown in Fig. 7. At thesame j wh 8 e1 '58.

time the extension I13 on bar I69 contacts with plate 242, whereby lever239 is rocked into the position shown in Fig. 7. In this rockingmovement of the lever. shoulder244' (Fig. 3) of lever 244 has carriedpawl 246 downwardly so that the latter is released from the stop bar 250and bar I5I, following the traction of spring I68 (Fig. 7) engagedtherewith, can move to the left. Bar I5I can move untilthe right edge ofrecess I54d is applied against the projection I48 on the slide I48d. Themovement of bar I5I releases the lateral extension 246 from the shoulder244' of the lever 244.

As stated, recess I54d (Fig. 7) is dimensioned so that ratchet wheel I58will rotate for three tooth subdivisions from the initial position shownin Fig. 3 in the direction of the arrow in Fig. 7. At the same time,however, on actuating slide 'I48d as shown in Fig. 7, the roller I16(Fig. 9) on extension I13 of bar I69 has come in contact with the camIII of the lever I11, so that the latter, when slide I48d. passes intoits lower end position, posi ively assumes the position shown in Fig. 7.In this, position of lever I11, however, the shaft I18 and the lever I84attached thereto has at the same time passed into the left end position,with respect to Fig. Go. Through the cam plate I86 and lever I99 as wellas the link member I94, rod 2| has thereby also been carried I slide 8d(Fig. 7)

into the position shown on Fig. 6a, insofar as the parts involved havenot previously assumed this position.

After shoulder 244' on lever 244 (Fig. 3) has depressed pawl 246 lever244 takes the position shown in Fig. 7, while pawl 246 (Fig. 3), throughthe action of spring 249 engaged therewith, is applied against thebottom of the stop bar 250 (Fig. 7). As soon as extension I13 reachesits lowest position, lever 239 also assumes its extreme swung-outposition and the corresponding edge of plate 242, through slight rockingof lever 255, passes into a depression 255 at the end of lever 255. Whena key I23 is pressed down nothing else takes place than previouslydescribed.

If the depressed key I23 is released (Fig. 7) it returns to the initialposition through the action of the spring I30 coordinated therewith. Atthe same time, however, slide I48d cannot at once pass back upwardly,since the upper edge of the projection I48 (Fig. 9) contacts with theupper wall of the U-shaped bar I5I limiting the recess I54d. The upperpart, or the central part, of the U-shaped bar is perforated (Fig. 7)only in the range of the entrance of the extension I48.

The result of this slight upward movement of is that also the bar I69and its projection I13 can also ascend for a corresponding extent. This,in turn, results in that lever 239 is rocked slightly upwardly in thedirection of the arrow on Fig. 7. On this move-- ment of lever 239 intothe intermediate position, however, the downwardly extending end oflever 255 is supported by its recess 255' against plate 242. Thereby,inasmuch as spring MI is stronger than spring 260, lever 252 is rockedslightly clockwise. In this rocking movement of lever 252 into saidintermediate position, however, shoulder 252 of lever 252 releases therocker plate I65, so that it rotates clockwise due to the traction ofthe rod 221 (Fig. 6) engaged therewith. The extension I, acting as apawl, thereby engages with the teeth of ratchet The lever 229 connectedwith rod 221 is thus able to swing through the action of spring 234 intothe dotted position of Fig. 16. In this rocking movement lever 229strikes against the pin 236 on lever I02 (Fig. 11), so that when lever229 passes into said dotted position of Fig. 16, shaft I1 is swung inthe direction of the arrow shown on Fig. 10. Thereby, through the rodsI06I III, the contact II2 for the circuit of the drive motor I I3 isclosed. At the same time lug I20 is also withdrawn from the recess 9' ofdisc II9, so that the motor, set inoperation, drives the intermediateshaft H6 and, through the gears H1 and H8, the main drive shaft 31.

In this movement of rod 221 lever 22I is at the same time rocked intothe dotted position of Fig. 16 and pawl 2I9' comes into positionopposite projection 206.

While drive shaft 31 describes its first revolution slide I BI is movedonce downwardly and upwardly through eccentric I64 (Fig. 6a) andconnecting rod I63. Shift pawl I59, journalled on slide IGI, is therebyalso moved downwardly and back. In the downward movement of slide I6I(see Fig. 7) the projection I59" on pawl I59 is first released, so thatthe pawl, after projection I59" has passed by the edge of plate I46, canswing somewhat in the direction of the arrow

